Function titleArgs

src/core/core.scale.js:131–166

(scale, offset, position, align)

}

function titleArgs(scale, offset, position, align) {
  const {top, left, bottom, right, chart} = scale;
  const {chartArea, scales} = chart;
  let rotation = 0;
  let maxWidth, titleX, titleY;
  const height = bottom - top;
  const width = right - left;

  if (scale.isHorizontal()) {
    titleX = _alignStartEnd(align, left, right);

    if (isObject(position)) {
      const positionAxisID = Object.keys(position)[0];
      const value = position[positionAxisID];
      titleY = scales[positionAxisID].getPixelForValue(value) + height - offset;
    } else if (position === 'center') {
      titleY = (chartArea.bottom + chartArea.top) / 2 + height - offset;
    } else {
      titleY = offsetFromEdge(scale, position, offset);
    }
    maxWidth = right - left;
  } else {
    if (isObject(position)) {
      const positionAxisID = Object.keys(position)[0];
      const value = position[positionAxisID];
      titleX = scales[positionAxisID].getPixelForValue(value) - width + offset;
    } else if (position === 'center') {
      titleX = (chartArea.left + chartArea.right) / 2 - width + offset;
    } else {
      titleX = offsetFromEdge(scale, position, offset);
    }
    titleY = _alignStartEnd(align, bottom, top);
    rotation = position === 'left' ? -HALF_PI : HALF_PI;
  }
  return {titleX, titleY, maxWidth, rotation};
}

export default class Scale extends Element {